节目以瓦格纳的歌剧《漂泊的荷兰人》的序曲开场。The programme opened with the overture to Wagner's Flying Dutchman.这首乐曲的序曲很长.The prelude to the musical composition is very long.这个序曲就象清晨房间里的一块三棱镜一样灿烂辉煌.The prelude was as iridescent as a pris...
Diacid has been got using diethylene glycol as decomposition agent of adduct.采用二甘醇作为加合物的分解剂,得到了二元酸.DTPA ( diethylene triamine penta - aceticacid )二乙烯三胺五醋酸 ( 有机螯合剂 )It is testified that the depolymerized products are tere...